Valve



Patented @et 17, 1922,

NETE@ STATES? JGHN B. B'URDETT, l0F GLENCOE, ILLNOIS, ASSIGNOR TO BURDETT MANUFACTURING COMPANY, 0F CHICAGO, ILLINOIS, A-CORPOB/AION OF DELAWARE.

VALVE.

Application led October 18, 1920. Serial No. 417,576.

To all whom t may concern.'

Be it known that I, JOHN B. BURDETT, a citizen of the United States, residing at Glencoe, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Valves, of which the following is a specication.

This invention relates to valves, particularly those for use in any sort of high pressure work, but especially for controlling high pressure gases, as for instance those used in blow pipe and torch work. lt is well understood that high pressure gas tanks require frequent cleaning out in order to remove the water driven out of the gas while under pressure in the tank, and that after a valve casing has been inserted in and used with a gas tank for any considerable length of time, it is almost impossible to remove the valve casing from the tank as is required for cleaning the tank without destroying the casing and more or less the valve mechanism contained therein. The object of the invention is to provide an unusuallyl secure and satisfactory valve which can be left closed for months without danger of allowing expensive gas to escape and be lost. A further and very important object is to provide mechanism by which it is possible to remove the operating parts of the valve structure from the case, thus making it possible to make the necessary clean outs on a gas tank without removing the valve case.

The invention consists in means for attaining the foregoing objects which can be easily and cheaply made, which is satisfactory in use and is not readily liable to get out of order. More particularly the invention consists in many features and details of construction hereafter more fully set forth in the specification and claim.

Referring to the drawings in which like numerals represent the same parts throughout the several views,

'Figure 1 is a vertical sectional detailed view of mechanism illustrating this invention in its preferred form, particularlyl that form in which all of the operating parts may be removed from the valve casing.

*igure 2 is a perspective view of a conthe line 5 5 of Figure 1 showing air pas sao'es about member 70.

llhe preferred form 'of the invention is shown in Figure 1 applied to a conventional .form of tubular valve case 10 provided at one end with screw threads 12 for engagement with a gas tank in the ordinary manner; provided at the other end with a conventional hand wheel 14 and provided intermediate of its ends with projecting arms or knobs 18 and 20, the former having a central perforation 22 for the main discharge of gas entering in a delivery pipe, not shown, attached by screw threads 24; the latter having a passage 26 adapted to deliver gas to a safety valve, not shown, attached by screw threads 28. The central perforation or passage through casing 10 has a variety of different diameters of different characters performing different functions. Portion 30 of this central perforation at the left hand end of the device, as shown in Figure l, is usually cylindrical but mayi he of any form suitable for the passage of gas from left to right through the device. Passage 30 enters at its right hand end, a somewhat larger but relatively short cylindrical passage 32 which enters a distinctly non-circular, in the particular case here illustrated hexagonal, passage 34 of approximately the same diameter as passage 30. This in turn opens into a larger circular passage 86 about the diameter of passage 32 and this latter passage 36 enters a substantially larger cylindrical passage 38 of substantial length, terminating in cylindrical passage 40, bearing screw threads 42 engaged by a closure cap 44 of conventional external construction. Passage 32 is merely an enlargement ofy passage 30 to facilitate passage of gas past member' 70 when it moves to the left from the position of Fig ure 1 into the vertical plane of passage 32.

Slidably mounted in the passage 38 is a cylindrical sleeve 46 having about its outer circumference a circumferential gas passage 48 always noimally in communication with passage 22. At one point in the circumference of sleeve 46 is a radial passage 50 connecting passage 48 with the main central longitudinal passage 52 through the sleeve. The outer left hand end of the sleeve shown in the drawing is notched to provide for a sealing washer 54 of ordinary construction and function in connection with the valve case. The opposite end of the sleeve end is correspondingly notched to receive the sealing washer 56 engaged by the nut 44 heretofore referred to.

Perforation 52 through the sleeve 46 is at itsleft hand end as shown in Figure 1 restricted in cross sectional area by the presence of an angular shoulder 58 located as shown at a convenient point to the left of passage 50 and is further restricted at the eXtreme left hand end by the presence of the angular shoulder 60. Reciprocatably mounted in sleeve 46 is a valve closure mechanism consisting oftwo oppositely disposed cones 62 and 64 adapted to respectively engage the angular shoulders 60 and 58 when the parts are in the position shown in Figure 1. Cone 62 is mounted on a screw member 66 entering and engaging the bod of a rotatable block or plug 68 whose left hand end is the cone 64. Cone 62 also carries a non-circular member 70 in the particular case here illustrated of hexagonal cross section, adapted to loosely slide in passage 34, heretofore described, the it being such that the gas may pass from left to right of Figure 1 through passage 34 past this member 70. Member 70, being larger than the passage enclosed by shoulder 60 acts as a pressure plate, when engaged by gas in passage 30 to force valve cone 62 to its seat. The right hand end of rotatable block 68 is provided with a protruding tooth 72 which loosely enters notch 74 in the head 76 travelling in a suitable passage 78 formed for it in the nut 44 and driven by shaft 8O to which hand wheel 14 is attached by any suitable means, as for instance a nut 82. The connection 72-74 is loose enough to permit of substantial reciprocation ofthe parts with reference to each vother without interfering with the driving of the plug bythe block 76. conventional form of spring 84 is interposed between the wheel 14 and the nut 44 to assist movement of the parts to the right as viewed in the ligure. A sealing washer 86 is interposed between the member 76 and the right hand end of passage 7 8 so that the escape of gas from the interior of case 10, via the circumference of member 80, is prevented.

ln the operation of the device as a valve the parts are in closed position. Gas lentering passage 30 is preventedfrom reaching passages 50 and 48 due to the engagement of cone 62` on shoulder 6() and the engagement of cone 64 on shoulder 58, thus eecting a ldouble sealing against the passage of gas in either direction. 1n this position gas inA passage 30 acting on disk 70 holds cone y62 absolutely on its seat 60. Vhen, however, the operator manipulates wheel 14 block 68 rotates on screw 66 which is held non-rotative by non-circular member 70 traveling in non-circular passage 84. As valve 62 is held on its seat by pressure of gas onmember 70, plug 68 first moves as far as it can go to the right whereupon further rotation of the plug y68 forces screw 66 to reciprocate thus moving valve 62'to the left olf its seatthat is to say, cones 64 and 62 move away from each other and move off from their respective shoulders 60 and 58, cone .62 to the left, cone k64 to the right, as viewed in the drawings. This leaves a free path for gas from passage 30 around member 70 between cone 62 and shoulder 60, thence past cone 64 and shoulder 58 to passages y5.0-48 and 22.

lV-hen it is necessary to clean a gas tank equipped with a valve of this invention all the operator hasto do is to loosen and remove nut 44 whereupon cones 62-64 and sleeve 16-carrying them are slipped to the iight out of the case and a clear passage of the diameter of passage 30 is left into the gas tank through which cleaning material may be inserted and withdrawn in the ordi` nary manner, just as efficiently as though the entire valve mechanism 10 were removed 'by loosening the connection of threadsl 12 with the tanlr.

One important feature of the deviceis that when the wheel 14 is manipulated to open the valve mechanism the handle on wheel 14 can be rotated far enough so that the member 76 will be forced tightly against washer 86 of the plug 68, thus elfectually preventing the escape of gas around the stem of member 80. Spring 84 maintains this connection at all times.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

ln mechanism -of the class described, a valve casing having a gaspassage through it to be closed, a conical valve member re# ciprocatably but non-rotatably mounted for -movement in said passage, anotherl conical valve member having its smaller end pointed toward the smaller end of the first valve member, a screw threaded connection between said conical members, means Aoperatable from outside the case, for rotating the second conical member, a member on the inside of the case affording shoulders adapted to be vengaged bysaid conical valve members to Close the passage of gas through the case, said member which carries said shoulnesses.

ders bein@ bodily removable from the case and Whenso removed carrying with it said JOHN B' BURDETT 5 conical valve members, for the purposes set Witnesses:

forth.

ln Witness whereof, l have hereunto sub DWIGHT B. CHEEVER, ANNA ROSENTHAL.

scribed my name in the presence of two Wit- 

